Check System Light on Lexus IS250 [Causes and How to Reset]

Encountering the “Check System” light on your Lexus IS250 dashboard can be concerning.

This warning light indicates that there might be an issue with the Tire Pressure Sensor (TPS) or one of the sensors responsible for monitoring your vehicle’s tires.

Understanding the purpose of the Tire Pressure Monitoring System (TPMS), what triggers the ‘Check System’ light, and how to address the problem will help you ensure your safety and maintain optimal performance.

In this post, I’ll explain in detail what the ‘Check System’ light on a Lexus IS250 means, the potential causes, and the steps to resolve the issue. Let’s dive in!

What Does the ‘Check System’ Light Mean on a Lexus IS250?

Check System Light on Lexus

The ‘Check System’ light on a Lexus IS250 is directly related to the Tire Pressure Monitoring System (TPMS).

The TPMS is designed to monitor the air pressure in your vehicle’s tires and alert you if any of them have low pressure or are flat. When the system detects an issue with the tire pressure or any of the TPMS sensors, it illuminates the ‘Check System’ light on the dashboard to notify the driver.

What Triggers the Check System Light?

The most common cause of the ‘Check System’ light on a Lexus IS250 is a fault with one of the Tire Pressure Sensors or an issue with the TPMS system. There are several reasons that can trigger this warning, including:

Low Tire Pressure:

If one or more of your tires have low pressure, it can trigger the ‘Check System’ light. This might be due to a slow leak, temperature changes, or improper inflation.

Faulty Tire Pressure Sensor:

Each tire is equipped with a sensor that sends data to the TPMS. A malfunctioning sensor can lead to inaccurate pressure readings or no readings at all.

Sensor Battery Failure:

The TPMS sensors are powered by batteries, which have a limited lifespan. If the sensor battery fails, it can trigger the warning light.

Sensor Signal Interference:

Signal interference from other electronic devices or metal objects near the sensors can disrupt their functioning and trigger the warning light.

How to Troubleshoot the Check System Light

When the ‘Check System’ light appears, here are some steps to take to address the issue:

Check Tire Pressure

Start by manually checking the tire pressure in all four tires, including the spare. Inflate them to the recommended pressure.

Inspect Tires and Sensors

Examine the tires for any signs of damage, punctures, or uneven wear. Also, visually inspect the TPMS sensors for physical damage. If any of the sensors is bad, get a replacement.

You can easily replace the tire pressure sensor on your Lexus IS250 by following the instructions in the video below:

However, if you’re not a DIY enthusiast, you can get a mechanic or take your car to the dealership for the TPMS replacement.

Reset the Check System Light

If you’ve fixed the issues that triggered the check system light and the light is still on your vehicle’s dashboard, you can reset it to turn off the light.

A quick way to reset this light is to turn off your vehicle’s ignition. Next, disconnect the battery, wait 15-20 seconds, and reconnect the battery. Then turn on your vehicle.

If that doesn’t help, your mechanic can use an OBD-II scanner to reset the warning light.

Professional Inspection

If the ‘Check System’ light persists after performing the above steps, it is best to consult a professional mechanic or a Lexus dealership. They have the necessary tools and expertise to diagnose and repair TPMS-related issues accurately.

Can You Drive a Lexus IS250 with the ‘Check System’ Light on?

While it is technically possible to drive the vehicle with the ‘Check System’ light on, it is not recommended.

Ignoring the warning could lead to potential tire-related problems, affecting vehicle handling, stability, and safety.

Driving with low tire pressure or a flat tire can cause further damage to the tires, reducing their lifespan and compromising overall vehicle performance.

Additionally, it is essential to ensure that the TPMS is functioning correctly to maintain accurate tire pressure monitoring.

Wrapping Up

The ‘Check System’ light on a Lexus IS250 is a crucial warning indicator that is directly related to the Tire Pressure Monitoring System (TPMS).

When this light illuminates, it signals an issue with one or more tire pressure sensors or the TPMS system itself. It is important to address the problem promptly to ensure your safety and prevent further damage to your vehicle’s tires.

Following these troubleshooting steps and seeking professional assistance (when needed) can help you maintain optimal tire performance and enjoy a safe and smooth driving experience in your Lexus IS250.